/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 11:42:33,758 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 11:42:33,759 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 11:42:33,798 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-06 11:42:33,798 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-06 11:42:33,799 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-06 11:42:33,800 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-06 11:42:33,802 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-06 11:42:33,804 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-06 11:42:33,804 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-06 11:42:33,805 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-06 11:42:33,806 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-06 11:42:33,807 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 11:42:33,813 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 11:42:33,814 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 11:42:33,817 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 11:42:33,818 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 11:42:33,820 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 11:42:33,826 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 11:42:33,828 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 11:42:33,829 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 11:42:33,831 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 11:42:33,832 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 11:42:33,834 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 11:42:33,839 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 11:42:33,842 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-04-06 11:42:33,842 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-04-06 11:42:33,842 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-04-06 11:42:33,843 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-04-06 11:42:33,843 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-04-06 11:42:33,844 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-04-06 11:42:33,844 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-04-06 11:42:33,845 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-04-06 11:42:33,845 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-04-06 11:42:33,846 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-04-06 11:42:33,846 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-04-06 11:42:33,846 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-04-06 11:42:33,847 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-04-06 11:42:33,847 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-04-06 11:42:33,847 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 11:42:33,848 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 11:42:33,849 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 11:42:33,850 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-06 11:42:33,877 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 11:42:33,878 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 11:42:33,879 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-06 11:42:33,879 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-06 11:42:33,880 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-06 11:42:33,880 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-06 11:42:33,880 INFO L138 SettingsManager]: * Use SBE=true [2022-04-06 11:42:33,880 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 11:42:33,880 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 11:42:33,881 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 11:42:33,881 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 11:42:33,881 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 11:42:33,882 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 11:42:33,882 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 11:42:33,882 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 11:42:33,882 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 11:42:33,882 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 11:42:33,882 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 11:42:33,882 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 11:42:33,882 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 11:42:33,882 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 11:42:33,883 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-06 11:42:33,883 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-06 11:42:33,883 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-06 11:42:33,883 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-06 11:42:33,883 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 11:42:33,883 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-06 11:42:33,883 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-06 11:42:33,885 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-06 11:42:33,886 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 11:42:34,122 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 11:42:34,145 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 11:42:34,147 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 11:42:34,148 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 11:42:34,150 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 11:42:34,151 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound10.c [2022-04-06 11:42:34,205 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e19ea844/23c42a9b957c4146a33508026f49b6eb/FLAGe373c879f [2022-04-06 11:42:34,544 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 11:42:34,545 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound10.c [2022-04-06 11:42:34,553 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e19ea844/23c42a9b957c4146a33508026f49b6eb/FLAGe373c879f [2022-04-06 11:42:34,945 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e19ea844/23c42a9b957c4146a33508026f49b6eb [2022-04-06 11:42:34,948 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 11:42:34,949 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-06 11:42:34,950 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 11:42:34,950 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 11:42:34,953 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 11:42:34,954 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 11:42:34" (1/1) ... [2022-04-06 11:42:34,955 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cf39d6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:42:34, skipping insertion in model container [2022-04-06 11:42:34,955 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 11:42:34" (1/1) ... [2022-04-06 11:42:34,961 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 11:42:34,974 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 11:42:35,104 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound10.c[490,503] [2022-04-06 11:42:35,124 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 11:42:35,131 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 11:42:35,142 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound10.c[490,503] [2022-04-06 11:42:35,150 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 11:42:35,161 INFO L208 MainTranslator]: Completed translation [2022-04-06 11:42:35,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:42:35 WrapperNode [2022-04-06 11:42:35,162 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 11:42:35,163 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 11:42:35,163 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 11:42:35,163 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 11:42:35,172 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:42:35" (1/1) ... [2022-04-06 11:42:35,173 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:42:35" (1/1) ... [2022-04-06 11:42:35,178 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:42:35" (1/1) ... [2022-04-06 11:42:35,179 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:42:35" (1/1) ... [2022-04-06 11:42:35,184 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:42:35" (1/1) ... [2022-04-06 11:42:35,188 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:42:35" (1/1) ... [2022-04-06 11:42:35,189 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:42:35" (1/1) ... [2022-04-06 11:42:35,190 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 11:42:35,191 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 11:42:35,191 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 11:42:35,192 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 11:42:35,192 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:42:35" (1/1) ... [2022-04-06 11:42:35,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 11:42:35,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:42:35,220 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 11:42:35,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 11:42:35,253 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 11:42:35,254 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 11:42:35,254 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 11:42:35,254 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 11:42:35,254 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 11:42:35,254 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 11:42:35,255 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 11:42:35,255 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 11:42:35,255 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 11:42:35,255 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 11:42:35,255 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 11:42:35,255 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 11:42:35,255 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 11:42:35,256 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 11:42:35,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 11:42:35,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 11:42:35,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 11:42:35,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 11:42:35,256 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 11:42:35,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 11:42:35,310 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 11:42:35,312 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 11:42:35,483 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 11:42:35,488 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 11:42:35,488 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-06 11:42:35,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 11:42:35 BoogieIcfgContainer [2022-04-06 11:42:35,490 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 11:42:35,491 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-06 11:42:35,491 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-06 11:42:35,494 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-06 11:42:35,497 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 11:42:35" (1/1) ... [2022-04-06 11:42:35,499 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-06 11:42:35,538 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 11:42:35 BasicIcfg [2022-04-06 11:42:35,538 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-06 11:42:35,544 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 11:42:35,544 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 11:42:35,548 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 11:42:35,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 11:42:34" (1/4) ... [2022-04-06 11:42:35,549 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@681bfd59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 11:42:35, skipping insertion in model container [2022-04-06 11:42:35,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:42:35" (2/4) ... [2022-04-06 11:42:35,549 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@681bfd59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 11:42:35, skipping insertion in model container [2022-04-06 11:42:35,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 11:42:35" (3/4) ... [2022-04-06 11:42:35,550 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@681bfd59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 11:42:35, skipping insertion in model container [2022-04-06 11:42:35,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 11:42:35" (4/4) ... [2022-04-06 11:42:35,551 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound10.cqvasr [2022-04-06 11:42:35,556 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-06 11:42:35,556 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 11:42:35,602 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 11:42:35,608 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 11:42:35,609 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 11:42:35,624 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 23 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 11:42:35,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-06 11:42:35,630 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:42:35,631 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:42:35,632 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:42:35,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:42:35,641 INFO L85 PathProgramCache]: Analyzing trace with hash -282167495, now seen corresponding path program 1 times [2022-04-06 11:42:35,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:42:35,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348598995] [2022-04-06 11:42:35,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:42:35,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:42:35,734 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:42:35,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1690818184] [2022-04-06 11:42:35,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:42:35,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:42:35,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:42:35,737 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:42:35,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 11:42:35,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:42:35,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 1 conjunts are in the unsatisfiable core [2022-04-06 11:42:35,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:42:35,935 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 11:42:35,935 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 11:42:35,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:42:35,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348598995] [2022-04-06 11:42:35,936 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:42:35,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690818184] [2022-04-06 11:42:35,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690818184] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 11:42:35,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 11:42:35,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-04-06 11:42:35,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114528449] [2022-04-06 11:42:35,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 11:42:35,946 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-04-06 11:42:35,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:42:35,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-04-06 11:42:35,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-04-06 11:42:35,977 INFO L87 Difference]: Start difference. First operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 23 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-06 11:42:36,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:42:36,006 INFO L93 Difference]: Finished difference Result 71 states and 110 transitions. [2022-04-06 11:42:36,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-04-06 11:42:36,009 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 32 [2022-04-06 11:42:36,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:42:36,017 INFO L225 Difference]: With dead ends: 71 [2022-04-06 11:42:36,017 INFO L226 Difference]: Without dead ends: 34 [2022-04-06 11:42:36,021 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-04-06 11:42:36,031 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 11:42:36,037 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 11:42:36,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-04-06 11:42:36,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-04-06 11:42:36,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 20 states have internal predecessors, (23), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 11:42:36,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2022-04-06 11:42:36,083 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 32 [2022-04-06 11:42:36,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:42:36,086 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2022-04-06 11:42:36,087 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-06 11:42:36,088 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2022-04-06 11:42:36,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 11:42:36,089 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:42:36,090 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:42:36,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 11:42:36,311 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-04-06 11:42:36,312 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:42:36,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:42:36,313 INFO L85 PathProgramCache]: Analyzing trace with hash -127828113, now seen corresponding path program 1 times [2022-04-06 11:42:36,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:42:36,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096810213] [2022-04-06 11:42:36,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:42:36,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:42:36,332 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:42:36,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1136510198] [2022-04-06 11:42:36,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:42:36,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:42:36,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:42:36,334 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:42:36,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 11:42:36,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:42:36,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 11:42:36,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:42:36,554 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 11:42:36,554 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 11:42:36,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:42:36,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096810213] [2022-04-06 11:42:36,556 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:42:36,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136510198] [2022-04-06 11:42:36,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136510198] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 11:42:36,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 11:42:36,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 11:42:36,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977677467] [2022-04-06 11:42:36,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 11:42:36,563 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 11:42:36,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:42:36,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 11:42:36,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 11:42:36,564 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 11:42:36,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:42:36,593 INFO L93 Difference]: Finished difference Result 44 states and 56 transitions. [2022-04-06 11:42:36,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 11:42:36,593 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-04-06 11:42:36,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:42:36,595 INFO L225 Difference]: With dead ends: 44 [2022-04-06 11:42:36,595 INFO L226 Difference]: Without dead ends: 36 [2022-04-06 11:42:36,595 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 11:42:36,596 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 11:42:36,597 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 110 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 11:42:36,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-04-06 11:42:36,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-04-06 11:42:36,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 11:42:36,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2022-04-06 11:42:36,604 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 33 [2022-04-06 11:42:36,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:42:36,605 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2022-04-06 11:42:36,605 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 11:42:36,605 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2022-04-06 11:42:36,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 11:42:36,606 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:42:36,606 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:42:36,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 11:42:36,820 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-04-06 11:42:36,821 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:42:36,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:42:36,822 INFO L85 PathProgramCache]: Analyzing trace with hash 365419517, now seen corresponding path program 1 times [2022-04-06 11:42:36,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:42:36,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666351176] [2022-04-06 11:42:36,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:42:36,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:42:36,846 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:42:36,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [432072095] [2022-04-06 11:42:36,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:42:36,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:42:36,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:42:36,849 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:42:36,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 11:42:36,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:42:36,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 11:42:36,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:42:36,997 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 11:42:36,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:42:37,146 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 11:42:37,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:42:37,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666351176] [2022-04-06 11:42:37,146 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:42:37,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432072095] [2022-04-06 11:42:37,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432072095] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 11:42:37,147 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 11:42:37,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-04-06 11:42:37,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200959724] [2022-04-06 11:42:37,147 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 11:42:37,148 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 11:42:37,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:42:37,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 11:42:37,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-04-06 11:42:37,152 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 11:42:37,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:42:37,271 INFO L93 Difference]: Finished difference Result 53 states and 71 transitions. [2022-04-06 11:42:37,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 11:42:37,272 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2022-04-06 11:42:37,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:42:37,273 INFO L225 Difference]: With dead ends: 53 [2022-04-06 11:42:37,273 INFO L226 Difference]: Without dead ends: 45 [2022-04-06 11:42:37,273 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-04-06 11:42:37,274 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 28 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 11:42:37,275 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 162 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 11:42:37,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-04-06 11:42:37,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2022-04-06 11:42:37,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 11:42:37,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2022-04-06 11:42:37,283 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 34 [2022-04-06 11:42:37,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:42:37,283 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2022-04-06 11:42:37,284 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 11:42:37,284 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2022-04-06 11:42:37,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 11:42:37,285 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:42:37,285 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:42:37,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 11:42:37,499 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:42:37,500 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:42:37,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:42:37,500 INFO L85 PathProgramCache]: Analyzing trace with hash 196514290, now seen corresponding path program 1 times [2022-04-06 11:42:37,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:42:37,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333142123] [2022-04-06 11:42:37,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:42:37,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:42:37,514 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:42:37,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2128915731] [2022-04-06 11:42:37,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:42:37,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:42:37,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:42:37,515 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:42:37,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 11:42:37,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:42:37,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 11:42:37,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:42:37,679 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 11:42:37,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:42:37,770 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 11:42:37,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:42:37,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333142123] [2022-04-06 11:42:37,771 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:42:37,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128915731] [2022-04-06 11:42:37,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128915731] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 11:42:37,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 11:42:37,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-04-06 11:42:37,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040161070] [2022-04-06 11:42:37,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 11:42:37,772 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 11:42:37,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:42:37,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 11:42:37,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-04-06 11:42:37,773 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-06 11:42:37,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:42:37,824 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2022-04-06 11:42:37,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 11:42:37,826 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 36 [2022-04-06 11:42:37,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:42:37,828 INFO L225 Difference]: With dead ends: 43 [2022-04-06 11:42:37,828 INFO L226 Difference]: Without dead ends: 41 [2022-04-06 11:42:37,829 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-04-06 11:42:37,829 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 7 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 11:42:37,829 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 131 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 11:42:37,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-04-06 11:42:37,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-04-06 11:42:37,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 25 states have internal predecessors, (29), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 11:42:37,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2022-04-06 11:42:37,836 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 36 [2022-04-06 11:42:37,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:42:37,837 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2022-04-06 11:42:37,837 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-06 11:42:37,837 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2022-04-06 11:42:37,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 11:42:37,838 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:42:37,838 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:42:37,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 11:42:38,051 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:42:38,052 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:42:38,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:42:38,052 INFO L85 PathProgramCache]: Analyzing trace with hash 56558454, now seen corresponding path program 1 times [2022-04-06 11:42:38,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:42:38,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820233179] [2022-04-06 11:42:38,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:42:38,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:42:38,065 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:42:38,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1164249811] [2022-04-06 11:42:38,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:42:38,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:42:38,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:42:38,067 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:42:38,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 11:42:38,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:42:38,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 11:42:38,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:42:38,235 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 11:42:38,235 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 11:42:38,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:42:38,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820233179] [2022-04-06 11:42:38,235 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:42:38,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164249811] [2022-04-06 11:42:38,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164249811] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 11:42:38,236 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 11:42:38,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 11:42:38,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660627636] [2022-04-06 11:42:38,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 11:42:38,236 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 11:42:38,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:42:38,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 11:42:38,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-06 11:42:38,237 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 11:42:38,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:42:38,274 INFO L93 Difference]: Finished difference Result 66 states and 84 transitions. [2022-04-06 11:42:38,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 11:42:38,275 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-04-06 11:42:38,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:42:38,277 INFO L225 Difference]: With dead ends: 66 [2022-04-06 11:42:38,277 INFO L226 Difference]: Without dead ends: 43 [2022-04-06 11:42:38,277 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-06 11:42:38,280 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 11:42:38,280 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 133 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 11:42:38,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-04-06 11:42:38,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-04-06 11:42:38,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 27 states have internal predecessors, (31), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 11:42:38,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2022-04-06 11:42:38,295 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 39 [2022-04-06 11:42:38,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:42:38,295 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2022-04-06 11:42:38,296 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 11:42:38,296 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2022-04-06 11:42:38,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 11:42:38,296 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:42:38,297 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:42:38,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 11:42:38,503 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:42:38,504 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:42:38,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:42:38,504 INFO L85 PathProgramCache]: Analyzing trace with hash 578094295, now seen corresponding path program 1 times [2022-04-06 11:42:38,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:42:38,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603550135] [2022-04-06 11:42:38,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:42:38,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:42:38,516 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:42:38,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1169664388] [2022-04-06 11:42:38,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:42:38,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:42:38,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:42:38,529 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:42:38,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 11:42:38,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:42:38,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 11:42:38,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:42:38,760 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 11:42:38,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:42:38,879 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 11:42:38,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:42:38,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603550135] [2022-04-06 11:42:38,879 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:42:38,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169664388] [2022-04-06 11:42:38,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169664388] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 11:42:38,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 11:42:38,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-04-06 11:42:38,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828208920] [2022-04-06 11:42:38,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 11:42:38,881 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 11:42:38,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:42:38,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 11:42:38,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-04-06 11:42:38,881 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 11:42:38,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:42:38,930 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2022-04-06 11:42:38,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 11:42:38,931 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 41 [2022-04-06 11:42:38,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:42:38,932 INFO L225 Difference]: With dead ends: 57 [2022-04-06 11:42:38,932 INFO L226 Difference]: Without dead ends: 55 [2022-04-06 11:42:38,932 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-04-06 11:42:38,933 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 8 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 11:42:38,933 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 157 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 11:42:38,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-04-06 11:42:38,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2022-04-06 11:42:38,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 32 states have (on average 1.21875) internal successors, (39), 33 states have internal predecessors, (39), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 11:42:38,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2022-04-06 11:42:38,941 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 41 [2022-04-06 11:42:38,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:42:38,942 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2022-04-06 11:42:38,942 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 11:42:38,942 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2022-04-06 11:42:38,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-06 11:42:38,943 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:42:38,943 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:42:38,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 11:42:39,167 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:42:39,168 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:42:39,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:42:39,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1581112078, now seen corresponding path program 1 times [2022-04-06 11:42:39,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:42:39,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612490478] [2022-04-06 11:42:39,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:42:39,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:42:39,183 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:42:39,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [271761713] [2022-04-06 11:42:39,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:42:39,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:42:39,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:42:39,184 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:42:39,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 11:42:39,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:42:39,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 11:42:39,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:42:39,421 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-04-06 11:42:39,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:42:39,531 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 11:42:39,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:42:39,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612490478] [2022-04-06 11:42:39,532 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:42:39,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271761713] [2022-04-06 11:42:39,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271761713] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 11:42:39,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 11:42:39,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-04-06 11:42:39,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264904627] [2022-04-06 11:42:39,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 11:42:39,533 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 11:42:39,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:42:39,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 11:42:39,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-04-06 11:42:39,533 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 11:42:39,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:42:39,590 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2022-04-06 11:42:39,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 11:42:39,590 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2022-04-06 11:42:39,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:42:39,593 INFO L225 Difference]: With dead ends: 61 [2022-04-06 11:42:39,593 INFO L226 Difference]: Without dead ends: 59 [2022-04-06 11:42:39,593 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-04-06 11:42:39,594 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 8 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 11:42:39,594 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 148 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 11:42:39,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-04-06 11:42:39,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2022-04-06 11:42:39,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 35 states have (on average 1.2) internal successors, (42), 36 states have internal predecessors, (42), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 11:42:39,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2022-04-06 11:42:39,608 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 46 [2022-04-06 11:42:39,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:42:39,609 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2022-04-06 11:42:39,609 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 11:42:39,609 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2022-04-06 11:42:39,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 11:42:39,610 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:42:39,610 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:42:39,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 11:42:39,831 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:42:39,832 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:42:39,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:42:39,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1942645143, now seen corresponding path program 1 times [2022-04-06 11:42:39,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:42:39,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330366155] [2022-04-06 11:42:39,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:42:39,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:42:39,843 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:42:39,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1616854862] [2022-04-06 11:42:39,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:42:39,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:42:39,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:42:39,844 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:42:39,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 11:42:39,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:42:39,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 11:42:39,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:42:40,200 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-04-06 11:42:40,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:42:40,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:42:40,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330366155] [2022-04-06 11:42:40,294 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:42:40,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616854862] [2022-04-06 11:42:40,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616854862] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 11:42:40,294 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 11:42:40,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-04-06 11:42:40,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657110907] [2022-04-06 11:42:40,294 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 11:42:40,295 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 11:42:40,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:42:40,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 11:42:40,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-04-06 11:42:40,296 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-06 11:42:40,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:42:40,446 INFO L93 Difference]: Finished difference Result 65 states and 78 transitions. [2022-04-06 11:42:40,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 11:42:40,447 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2022-04-06 11:42:40,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:42:40,449 INFO L225 Difference]: With dead ends: 65 [2022-04-06 11:42:40,449 INFO L226 Difference]: Without dead ends: 63 [2022-04-06 11:42:40,449 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-04-06 11:42:40,450 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 35 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 11:42:40,450 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 140 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 11:42:40,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-04-06 11:42:40,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2022-04-06 11:42:40,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 39 states have internal predecessors, (45), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 11:42:40,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2022-04-06 11:42:40,464 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 51 [2022-04-06 11:42:40,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:42:40,465 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2022-04-06 11:42:40,465 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-06 11:42:40,466 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2022-04-06 11:42:40,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-04-06 11:42:40,470 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:42:40,471 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:42:40,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 11:42:40,689 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-04-06 11:42:40,690 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:42:40,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:42:40,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1573186588, now seen corresponding path program 1 times [2022-04-06 11:42:40,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:42:40,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355123595] [2022-04-06 11:42:40,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:42:40,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:42:40,701 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:42:40,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [252265545] [2022-04-06 11:42:40,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:42:40,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:42:40,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:42:40,706 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:42:40,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 11:42:40,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:42:40,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 11:42:40,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:42:40,876 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-06 11:42:40,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:42:41,000 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-06 11:42:41,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:42:41,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355123595] [2022-04-06 11:42:41,000 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:42:41,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252265545] [2022-04-06 11:42:41,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252265545] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 11:42:41,001 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 11:42:41,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-04-06 11:42:41,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582015698] [2022-04-06 11:42:41,001 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 11:42:41,002 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 11:42:41,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:42:41,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 11:42:41,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-04-06 11:42:41,002 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 6 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (18), 4 states have call predecessors, (18), 5 states have call successors, (18) [2022-04-06 11:42:41,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:42:41,179 INFO L93 Difference]: Finished difference Result 215 states and 254 transitions. [2022-04-06 11:42:41,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 11:42:41,180 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 6 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (18), 4 states have call predecessors, (18), 5 states have call successors, (18) Word has length 60 [2022-04-06 11:42:41,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:42:41,182 INFO L225 Difference]: With dead ends: 215 [2022-04-06 11:42:41,182 INFO L226 Difference]: Without dead ends: 207 [2022-04-06 11:42:41,182 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-04-06 11:42:41,183 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 139 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 11:42:41,183 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 201 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 11:42:41,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-04-06 11:42:41,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 199. [2022-04-06 11:42:41,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 126 states have (on average 1.1904761904761905) internal successors, (150), 130 states have internal predecessors, (150), 46 states have call successors, (46), 27 states have call predecessors, (46), 26 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2022-04-06 11:42:41,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 237 transitions. [2022-04-06 11:42:41,206 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 237 transitions. Word has length 60 [2022-04-06 11:42:41,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:42:41,206 INFO L478 AbstractCegarLoop]: Abstraction has 199 states and 237 transitions. [2022-04-06 11:42:41,206 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 6 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (18), 4 states have call predecessors, (18), 5 states have call successors, (18) [2022-04-06 11:42:41,206 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 237 transitions. [2022-04-06 11:42:41,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 11:42:41,207 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:42:41,207 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:42:41,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 11:42:41,408 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:42:41,408 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:42:41,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:42:41,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1491020248, now seen corresponding path program 1 times [2022-04-06 11:42:41,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:42:41,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991043497] [2022-04-06 11:42:41,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:42:41,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:42:41,418 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:42:41,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [100380484] [2022-04-06 11:42:41,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:42:41,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:42:41,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:42:41,420 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:42:41,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 11:42:41,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:42:41,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 11:42:41,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:42:41,594 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-04-06 11:42:41,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:42:41,739 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-04-06 11:42:41,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:42:41,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991043497] [2022-04-06 11:42:41,740 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:42:41,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100380484] [2022-04-06 11:42:41,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100380484] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 11:42:41,740 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 11:42:41,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-04-06 11:42:41,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38048088] [2022-04-06 11:42:41,741 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 11:42:41,742 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 11:42:41,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:42:41,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 11:42:41,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-04-06 11:42:41,743 INFO L87 Difference]: Start difference. First operand 199 states and 237 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-04-06 11:42:41,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:42:41,988 INFO L93 Difference]: Finished difference Result 283 states and 368 transitions. [2022-04-06 11:42:41,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 11:42:41,989 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 61 [2022-04-06 11:42:41,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:42:41,993 INFO L225 Difference]: With dead ends: 283 [2022-04-06 11:42:41,993 INFO L226 Difference]: Without dead ends: 263 [2022-04-06 11:42:41,996 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-04-06 11:42:41,997 INFO L913 BasicCegarLoop]: 70 mSDtfsCounter, 64 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 11:42:41,998 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 262 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 11:42:41,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-04-06 11:42:42,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 239. [2022-04-06 11:42:42,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 153 states have (on average 1.2222222222222223) internal successors, (187), 156 states have internal predecessors, (187), 60 states have call successors, (60), 26 states have call predecessors, (60), 25 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) [2022-04-06 11:42:42,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 303 transitions. [2022-04-06 11:42:42,040 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 303 transitions. Word has length 61 [2022-04-06 11:42:42,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:42:42,041 INFO L478 AbstractCegarLoop]: Abstraction has 239 states and 303 transitions. [2022-04-06 11:42:42,041 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-04-06 11:42:42,041 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 303 transitions. [2022-04-06 11:42:42,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-06 11:42:42,042 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:42:42,042 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:42:42,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 11:42:42,267 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-06 11:42:42,268 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:42:42,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:42:42,268 INFO L85 PathProgramCache]: Analyzing trace with hash 317217743, now seen corresponding path program 1 times [2022-04-06 11:42:42,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:42:42,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322666893] [2022-04-06 11:42:42,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:42:42,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:42:42,277 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:42:42,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1867523579] [2022-04-06 11:42:42,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:42:42,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:42:42,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:42:42,279 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:42:42,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 11:42:42,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:42:42,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 11:42:42,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:42:42,484 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-06 11:42:42,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:42:42,630 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-06 11:42:42,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:42:42,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322666893] [2022-04-06 11:42:42,630 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:42:42,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867523579] [2022-04-06 11:42:42,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867523579] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 11:42:42,631 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 11:42:42,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-04-06 11:42:42,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887686139] [2022-04-06 11:42:42,631 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 11:42:42,631 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 11:42:42,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:42:42,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 11:42:42,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-04-06 11:42:42,632 INFO L87 Difference]: Start difference. First operand 239 states and 303 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 6 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (18), 4 states have call predecessors, (18), 5 states have call successors, (18) [2022-04-06 11:42:42,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:42:42,825 INFO L93 Difference]: Finished difference Result 348 states and 452 transitions. [2022-04-06 11:42:42,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 11:42:42,825 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 6 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (18), 4 states have call predecessors, (18), 5 states have call successors, (18) Word has length 63 [2022-04-06 11:42:42,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:42:42,827 INFO L225 Difference]: With dead ends: 348 [2022-04-06 11:42:42,827 INFO L226 Difference]: Without dead ends: 252 [2022-04-06 11:42:42,828 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-04-06 11:42:42,828 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 103 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 11:42:42,829 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 193 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 11:42:42,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-04-06 11:42:42,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 248. [2022-04-06 11:42:42,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 162 states have (on average 1.1728395061728396) internal successors, (190), 165 states have internal predecessors, (190), 60 states have call successors, (60), 26 states have call predecessors, (60), 25 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) [2022-04-06 11:42:42,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 306 transitions. [2022-04-06 11:42:42,849 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 306 transitions. Word has length 63 [2022-04-06 11:42:42,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:42:42,850 INFO L478 AbstractCegarLoop]: Abstraction has 248 states and 306 transitions. [2022-04-06 11:42:42,850 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 6 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (18), 4 states have call predecessors, (18), 5 states have call successors, (18) [2022-04-06 11:42:42,850 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 306 transitions. [2022-04-06 11:42:42,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 11:42:42,851 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:42:42,851 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:42:42,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 11:42:43,067 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-04-06 11:42:43,067 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:42:43,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:42:43,068 INFO L85 PathProgramCache]: Analyzing trace with hash 918639692, now seen corresponding path program 1 times [2022-04-06 11:42:43,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:42:43,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772417532] [2022-04-06 11:42:43,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:42:43,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:42:43,084 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:42:43,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1528151674] [2022-04-06 11:42:43,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:42:43,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:42:43,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:42:43,087 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:42:43,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 11:42:43,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:42:43,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-06 11:42:43,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:42:43,436 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-04-06 11:42:43,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:42:43,625 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-04-06 11:42:43,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:42:43,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772417532] [2022-04-06 11:42:43,625 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:42:43,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528151674] [2022-04-06 11:42:43,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528151674] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 11:42:43,626 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 11:42:43,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-04-06 11:42:43,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367090448] [2022-04-06 11:42:43,626 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 11:42:43,626 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 11:42:43,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:42:43,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 11:42:43,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-04-06 11:42:43,627 INFO L87 Difference]: Start difference. First operand 248 states and 306 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-04-06 11:42:44,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:42:44,012 INFO L93 Difference]: Finished difference Result 334 states and 433 transitions. [2022-04-06 11:42:44,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 11:42:44,013 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 68 [2022-04-06 11:42:44,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:42:44,015 INFO L225 Difference]: With dead ends: 334 [2022-04-06 11:42:44,016 INFO L226 Difference]: Without dead ends: 328 [2022-04-06 11:42:44,016 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-04-06 11:42:44,017 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 47 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 11:42:44,017 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 294 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 11:42:44,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-04-06 11:42:44,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 295. [2022-04-06 11:42:44,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 195 states have (on average 1.1948717948717948) internal successors, (233), 204 states have internal predecessors, (233), 71 states have call successors, (71), 29 states have call predecessors, (71), 28 states have return successors, (66), 61 states have call predecessors, (66), 66 states have call successors, (66) [2022-04-06 11:42:44,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 370 transitions. [2022-04-06 11:42:44,049 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 370 transitions. Word has length 68 [2022-04-06 11:42:44,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:42:44,049 INFO L478 AbstractCegarLoop]: Abstraction has 295 states and 370 transitions. [2022-04-06 11:42:44,049 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-04-06 11:42:44,049 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 370 transitions. [2022-04-06 11:42:44,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-04-06 11:42:44,050 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:42:44,050 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:42:44,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 11:42:44,275 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-04-06 11:42:44,276 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:42:44,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:42:44,276 INFO L85 PathProgramCache]: Analyzing trace with hash -210356579, now seen corresponding path program 2 times [2022-04-06 11:42:44,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:42:44,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098057865] [2022-04-06 11:42:44,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:42:44,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:42:44,286 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:42:44,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1274866646] [2022-04-06 11:42:44,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 11:42:44,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:42:44,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:42:44,288 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:42:44,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 11:42:44,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 11:42:44,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 11:42:44,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-06 11:42:44,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:42:44,685 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 17 proven. 18 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-04-06 11:42:44,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:42:45,039 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 17 proven. 18 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-04-06 11:42:45,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:42:45,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098057865] [2022-04-06 11:42:45,039 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:42:45,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274866646] [2022-04-06 11:42:45,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274866646] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 11:42:45,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 11:42:45,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2022-04-06 11:42:45,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526396490] [2022-04-06 11:42:45,040 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 11:42:45,040 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 11:42:45,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:42:45,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 11:42:45,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-04-06 11:42:45,041 INFO L87 Difference]: Start difference. First operand 295 states and 370 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) [2022-04-06 11:42:47,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:42:47,011 INFO L93 Difference]: Finished difference Result 319 states and 399 transitions. [2022-04-06 11:42:47,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 11:42:47,012 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) Word has length 73 [2022-04-06 11:42:47,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:42:47,013 INFO L225 Difference]: With dead ends: 319 [2022-04-06 11:42:47,013 INFO L226 Difference]: Without dead ends: 316 [2022-04-06 11:42:47,014 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2022-04-06 11:42:47,014 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 66 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-04-06 11:42:47,015 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 201 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-04-06 11:42:47,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-04-06 11:42:47,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 305. [2022-04-06 11:42:47,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 204 states have (on average 1.1862745098039216) internal successors, (242), 212 states have internal predecessors, (242), 69 states have call successors, (69), 32 states have call predecessors, (69), 31 states have return successors, (65), 60 states have call predecessors, (65), 65 states have call successors, (65) [2022-04-06 11:42:47,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 376 transitions. [2022-04-06 11:42:47,043 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 376 transitions. Word has length 73 [2022-04-06 11:42:47,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:42:47,044 INFO L478 AbstractCegarLoop]: Abstraction has 305 states and 376 transitions. [2022-04-06 11:42:47,044 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) [2022-04-06 11:42:47,044 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 376 transitions. [2022-04-06 11:42:47,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-04-06 11:42:47,044 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:42:47,045 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:42:47,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-06 11:42:47,262 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-06 11:42:47,262 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:42:47,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:42:47,263 INFO L85 PathProgramCache]: Analyzing trace with hash 952478412, now seen corresponding path program 3 times [2022-04-06 11:42:47,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:42:47,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136414630] [2022-04-06 11:42:47,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:42:47,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:42:47,270 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:42:47,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [4974044] [2022-04-06 11:42:47,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 11:42:47,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:42:47,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:42:47,274 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:42:47,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 11:42:47,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-04-06 11:42:47,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 11:42:47,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 40 conjunts are in the unsatisfiable core [2022-04-06 11:42:47,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:42:47,840 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 31 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-04-06 11:42:47,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:42:47,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:42:47,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136414630] [2022-04-06 11:42:47,936 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:42:47,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4974044] [2022-04-06 11:42:47,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4974044] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 11:42:47,936 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 11:42:47,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-04-06 11:42:47,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009852736] [2022-04-06 11:42:47,936 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 11:42:47,937 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 11:42:47,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:42:47,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 11:42:47,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-04-06 11:42:47,937 INFO L87 Difference]: Start difference. First operand 305 states and 376 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-04-06 11:42:48,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:42:48,320 INFO L93 Difference]: Finished difference Result 337 states and 411 transitions. [2022-04-06 11:42:48,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 11:42:48,321 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 78 [2022-04-06 11:42:48,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:42:48,323 INFO L225 Difference]: With dead ends: 337 [2022-04-06 11:42:48,323 INFO L226 Difference]: Without dead ends: 333 [2022-04-06 11:42:48,323 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-04-06 11:42:48,324 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 24 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 11:42:48,324 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 202 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 11:42:48,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-04-06 11:42:48,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 330. [2022-04-06 11:42:48,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 221 states have (on average 1.1764705882352942) internal successors, (260), 228 states have internal predecessors, (260), 73 states have call successors, (73), 37 states have call predecessors, (73), 35 states have return successors, (69), 64 states have call predecessors, (69), 69 states have call successors, (69) [2022-04-06 11:42:48,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 402 transitions. [2022-04-06 11:42:48,355 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 402 transitions. Word has length 78 [2022-04-06 11:42:48,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:42:48,356 INFO L478 AbstractCegarLoop]: Abstraction has 330 states and 402 transitions. [2022-04-06 11:42:48,356 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-04-06 11:42:48,356 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 402 transitions. [2022-04-06 11:42:48,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-04-06 11:42:48,357 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:42:48,357 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:42:48,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-06 11:42:48,579 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:42:48,579 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:42:48,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:42:48,580 INFO L85 PathProgramCache]: Analyzing trace with hash 900405455, now seen corresponding path program 1 times [2022-04-06 11:42:48,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:42:48,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081663466] [2022-04-06 11:42:48,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:42:48,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:42:48,588 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:42:48,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2107810803] [2022-04-06 11:42:48,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:42:48,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:42:48,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:42:48,589 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:42:48,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 11:42:48,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:42:48,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 42 conjunts are in the unsatisfiable core [2022-04-06 11:42:48,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:42:49,204 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 30 proven. 17 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-04-06 11:42:49,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:42:49,855 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 30 proven. 17 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-04-06 11:42:49,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:42:49,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081663466] [2022-04-06 11:42:49,856 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:42:49,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107810803] [2022-04-06 11:42:49,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107810803] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 11:42:49,856 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 11:42:49,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-04-06 11:42:49,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127229325] [2022-04-06 11:42:49,856 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 11:42:49,857 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 11:42:49,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:42:49,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 11:42:49,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-04-06 11:42:49,858 INFO L87 Difference]: Start difference. First operand 330 states and 402 transitions. Second operand has 19 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 18 states have internal predecessors, (45), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) [2022-04-06 11:42:53,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:42:53,532 INFO L93 Difference]: Finished difference Result 392 states and 488 transitions. [2022-04-06 11:42:53,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 11:42:53,533 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 18 states have internal predecessors, (45), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) Word has length 84 [2022-04-06 11:42:53,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:42:53,535 INFO L225 Difference]: With dead ends: 392 [2022-04-06 11:42:53,535 INFO L226 Difference]: Without dead ends: 377 [2022-04-06 11:42:53,536 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 149 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=248, Invalid=1084, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 11:42:53,537 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 80 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-04-06 11:42:53,537 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 377 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-04-06 11:42:53,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-04-06 11:42:53,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 368. [2022-04-06 11:42:53,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 247 states have (on average 1.1902834008097165) internal successors, (294), 252 states have internal predecessors, (294), 84 states have call successors, (84), 37 states have call predecessors, (84), 36 states have return successors, (82), 78 states have call predecessors, (82), 82 states have call successors, (82) [2022-04-06 11:42:53,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 460 transitions. [2022-04-06 11:42:53,585 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 460 transitions. Word has length 84 [2022-04-06 11:42:53,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:42:53,585 INFO L478 AbstractCegarLoop]: Abstraction has 368 states and 460 transitions. [2022-04-06 11:42:53,586 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 18 states have internal predecessors, (45), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) [2022-04-06 11:42:53,586 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 460 transitions. [2022-04-06 11:42:53,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-04-06 11:42:53,587 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:42:53,587 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:42:53,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-06 11:42:53,803 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-04-06 11:42:53,803 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:42:53,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:42:53,804 INFO L85 PathProgramCache]: Analyzing trace with hash 653404933, now seen corresponding path program 1 times [2022-04-06 11:42:53,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:42:53,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322776497] [2022-04-06 11:42:53,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:42:53,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:42:53,816 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:42:53,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [414725838] [2022-04-06 11:42:53,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:42:53,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:42:53,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:42:53,818 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:42:53,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-06 11:42:53,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:42:53,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 11:42:53,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:42:54,708 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 51 proven. 23 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2022-04-06 11:42:54,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:42:55,096 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 11:42:56,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:42:56,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322776497] [2022-04-06 11:42:56,637 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:42:56,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414725838] [2022-04-06 11:42:56,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414725838] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 11:42:56,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 11:42:56,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-04-06 11:42:56,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214586976] [2022-04-06 11:42:56,638 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 11:42:56,638 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 11:42:56,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:42:56,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 11:42:56,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-04-06 11:42:56,639 INFO L87 Difference]: Start difference. First operand 368 states and 460 transitions. Second operand has 11 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2022-04-06 11:42:57,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:42:57,358 INFO L93 Difference]: Finished difference Result 377 states and 468 transitions. [2022-04-06 11:42:57,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 11:42:57,359 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 101 [2022-04-06 11:42:57,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:42:57,361 INFO L225 Difference]: With dead ends: 377 [2022-04-06 11:42:57,361 INFO L226 Difference]: Without dead ends: 375 [2022-04-06 11:42:57,361 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-04-06 11:42:57,362 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 30 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 11:42:57,362 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 281 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 11:42:57,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2022-04-06 11:42:57,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 372. [2022-04-06 11:42:57,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 250 states have (on average 1.184) internal successors, (296), 255 states have internal predecessors, (296), 84 states have call successors, (84), 38 states have call predecessors, (84), 37 states have return successors, (82), 78 states have call predecessors, (82), 82 states have call successors, (82) [2022-04-06 11:42:57,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 462 transitions. [2022-04-06 11:42:57,410 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 462 transitions. Word has length 101 [2022-04-06 11:42:57,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:42:57,410 INFO L478 AbstractCegarLoop]: Abstraction has 372 states and 462 transitions. [2022-04-06 11:42:57,410 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2022-04-06 11:42:57,410 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 462 transitions. [2022-04-06 11:42:57,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-04-06 11:42:57,411 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:42:57,411 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:42:57,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-06 11:42:57,627 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-04-06 11:42:57,627 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:42:57,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:42:57,628 INFO L85 PathProgramCache]: Analyzing trace with hash 487608439, now seen corresponding path program 4 times [2022-04-06 11:42:57,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:42:57,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146074730] [2022-04-06 11:42:57,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:42:57,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:42:57,642 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:42:57,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1316821550] [2022-04-06 11:42:57,643 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 11:42:57,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:42:57,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:42:57,672 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:42:57,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-06 11:42:57,721 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 11:42:57,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 11:42:57,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 11:42:57,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:42:57,848 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 141 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-04-06 11:42:57,848 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 11:42:57,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:42:57,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146074730] [2022-04-06 11:42:57,848 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:42:57,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316821550] [2022-04-06 11:42:57,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316821550] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 11:42:57,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 11:42:57,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 11:42:57,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476726684] [2022-04-06 11:42:57,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 11:42:57,849 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 11:42:57,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:42:57,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 11:42:57,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 11:42:57,850 INFO L87 Difference]: Start difference. First operand 372 states and 462 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-04-06 11:42:57,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:42:57,978 INFO L93 Difference]: Finished difference Result 535 states and 713 transitions. [2022-04-06 11:42:57,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 11:42:57,979 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 105 [2022-04-06 11:42:57,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:42:57,982 INFO L225 Difference]: With dead ends: 535 [2022-04-06 11:42:57,983 INFO L226 Difference]: Without dead ends: 417 [2022-04-06 11:42:57,983 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-04-06 11:42:57,984 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 12 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 11:42:57,984 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 172 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 11:42:57,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2022-04-06 11:42:58,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 387. [2022-04-06 11:42:58,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 259 states have (on average 1.193050193050193) internal successors, (309), 263 states have internal predecessors, (309), 90 states have call successors, (90), 38 states have call predecessors, (90), 37 states have return successors, (88), 85 states have call predecessors, (88), 88 states have call successors, (88) [2022-04-06 11:42:58,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 487 transitions. [2022-04-06 11:42:58,049 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 487 transitions. Word has length 105 [2022-04-06 11:42:58,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:42:58,049 INFO L478 AbstractCegarLoop]: Abstraction has 387 states and 487 transitions. [2022-04-06 11:42:58,049 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-04-06 11:42:58,049 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 487 transitions. [2022-04-06 11:42:58,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-04-06 11:42:58,051 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:42:58,051 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:42:58,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-06 11:42:58,275 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-04-06 11:42:58,276 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:42:58,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:42:58,276 INFO L85 PathProgramCache]: Analyzing trace with hash 791718745, now seen corresponding path program 1 times [2022-04-06 11:42:58,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:42:58,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905780929] [2022-04-06 11:42:58,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:42:58,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:42:58,289 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:42:58,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [666269799] [2022-04-06 11:42:58,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:42:58,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:42:58,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:42:58,290 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:42:58,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-06 11:42:58,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:42:58,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 11:42:58,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:42:58,586 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 229 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-04-06 11:42:58,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:42:58,812 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-04-06 11:42:58,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:42:58,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905780929] [2022-04-06 11:42:58,813 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:42:58,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666269799] [2022-04-06 11:42:58,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666269799] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 11:42:58,813 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 11:42:58,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2022-04-06 11:42:58,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969214262] [2022-04-06 11:42:58,813 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 11:42:58,814 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 11:42:58,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:42:58,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 11:42:58,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-04-06 11:42:58,814 INFO L87 Difference]: Start difference. First operand 387 states and 487 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 9 states have call successors, (36), 7 states have call predecessors, (36), 6 states have return successors, (34), 7 states have call predecessors, (34), 8 states have call successors, (34) [2022-04-06 11:42:59,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:42:59,198 INFO L93 Difference]: Finished difference Result 937 states and 1217 transitions. [2022-04-06 11:42:59,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 11:42:59,198 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 9 states have call successors, (36), 7 states have call predecessors, (36), 6 states have return successors, (34), 7 states have call predecessors, (34), 8 states have call successors, (34) Word has length 116 [2022-04-06 11:42:59,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:42:59,202 INFO L225 Difference]: With dead ends: 937 [2022-04-06 11:42:59,202 INFO L226 Difference]: Without dead ends: 804 [2022-04-06 11:42:59,203 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 218 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=297, Unknown=0, NotChecked=0, Total=462 [2022-04-06 11:42:59,204 INFO L913 BasicCegarLoop]: 74 mSDtfsCounter, 152 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 11:42:59,204 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 303 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 11:42:59,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2022-04-06 11:42:59,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 778. [2022-04-06 11:42:59,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 507 states have (on average 1.1637080867850098) internal successors, (590), 514 states have internal predecessors, (590), 189 states have call successors, (189), 82 states have call predecessors, (189), 81 states have return successors, (184), 181 states have call predecessors, (184), 184 states have call successors, (184) [2022-04-06 11:42:59,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 963 transitions. [2022-04-06 11:42:59,299 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 963 transitions. Word has length 116 [2022-04-06 11:42:59,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:42:59,300 INFO L478 AbstractCegarLoop]: Abstraction has 778 states and 963 transitions. [2022-04-06 11:42:59,300 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 9 states have call successors, (36), 7 states have call predecessors, (36), 6 states have return successors, (34), 7 states have call predecessors, (34), 8 states have call successors, (34) [2022-04-06 11:42:59,300 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 963 transitions. [2022-04-06 11:42:59,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-04-06 11:42:59,303 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:42:59,303 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:42:59,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-04-06 11:42:59,519 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-04-06 11:42:59,519 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:42:59,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:42:59,520 INFO L85 PathProgramCache]: Analyzing trace with hash -351372628, now seen corresponding path program 2 times [2022-04-06 11:42:59,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:42:59,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248455883] [2022-04-06 11:42:59,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:42:59,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:42:59,527 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:42:59,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [154837188] [2022-04-06 11:42:59,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 11:42:59,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:42:59,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:42:59,528 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:42:59,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-04-06 11:42:59,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 11:42:59,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 11:42:59,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 73 conjunts are in the unsatisfiable core [2022-04-06 11:42:59,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:43:02,701 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 11:43:04,689 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 139 proven. 92 refuted. 0 times theorem prover too weak. 285 trivial. 0 not checked. [2022-04-06 11:43:04,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:43:13,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:43:13,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248455883] [2022-04-06 11:43:13,347 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:43:13,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154837188] [2022-04-06 11:43:13,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154837188] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 11:43:13,347 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 11:43:13,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-04-06 11:43:13,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471592245] [2022-04-06 11:43:13,347 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 11:43:13,347 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 11:43:13,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:43:13,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 11:43:13,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=509, Unknown=1, NotChecked=0, Total=650 [2022-04-06 11:43:13,348 INFO L87 Difference]: Start difference. First operand 778 states and 963 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 13 states have internal predecessors, (37), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 7 states have call predecessors, (20), 8 states have call successors, (20) [2022-04-06 11:43:15,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:43:15,280 INFO L93 Difference]: Finished difference Result 843 states and 1038 transitions. [2022-04-06 11:43:15,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 11:43:15,281 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 13 states have internal predecessors, (37), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 7 states have call predecessors, (20), 8 states have call successors, (20) Word has length 124 [2022-04-06 11:43:15,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:43:15,285 INFO L225 Difference]: With dead ends: 843 [2022-04-06 11:43:15,285 INFO L226 Difference]: Without dead ends: 841 [2022-04-06 11:43:15,286 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 147 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=187, Invalid=742, Unknown=1, NotChecked=0, Total=930 [2022-04-06 11:43:15,286 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 54 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 11:43:15,286 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 310 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 712 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 11:43:15,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2022-04-06 11:43:15,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 837. [2022-04-06 11:43:15,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 545 states have (on average 1.1577981651376146) internal successors, (631), 552 states have internal predecessors, (631), 201 states have call successors, (201), 91 states have call predecessors, (201), 90 states have return successors, (196), 193 states have call predecessors, (196), 196 states have call successors, (196) [2022-04-06 11:43:15,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 1028 transitions. [2022-04-06 11:43:15,428 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 1028 transitions. Word has length 124 [2022-04-06 11:43:15,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:43:15,429 INFO L478 AbstractCegarLoop]: Abstraction has 837 states and 1028 transitions. [2022-04-06 11:43:15,429 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 13 states have internal predecessors, (37), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 7 states have call predecessors, (20), 8 states have call successors, (20) [2022-04-06 11:43:15,429 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 1028 transitions. [2022-04-06 11:43:15,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-04-06 11:43:15,430 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:43:15,430 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:43:15,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-04-06 11:43:15,643 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:43:15,643 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:43:15,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:43:15,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1703433466, now seen corresponding path program 3 times [2022-04-06 11:43:15,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:43:15,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638793055] [2022-04-06 11:43:15,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:43:15,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:43:15,665 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:43:15,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [755068939] [2022-04-06 11:43:15,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 11:43:15,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:43:15,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:43:15,671 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:43:15,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-04-06 11:43:15,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-04-06 11:43:15,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 11:43:15,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 67 conjunts are in the unsatisfiable core [2022-04-06 11:43:15,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:43:16,829 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 100 proven. 57 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2022-04-06 11:43:16,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:43:27,448 WARN L232 SmtUtils]: Spent 6.01s on a formula simplification that was a NOOP. DAG size: 24 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-04-06 11:44:18,850 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 100 proven. 56 refuted. 1 times theorem prover too weak. 366 trivial. 0 not checked. [2022-04-06 11:44:18,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:44:18,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638793055] [2022-04-06 11:44:18,850 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:44:18,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755068939] [2022-04-06 11:44:18,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755068939] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 11:44:18,851 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 11:44:18,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2022-04-06 11:44:18,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366184834] [2022-04-06 11:44:18,851 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 11:44:18,851 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 11:44:18,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:44:18,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 11:44:18,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=357, Unknown=1, NotChecked=0, Total=462 [2022-04-06 11:44:18,852 INFO L87 Difference]: Start difference. First operand 837 states and 1028 transitions. Second operand has 22 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 12 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (37), 14 states have call predecessors, (37), 11 states have call successors, (37) [2022-04-06 11:44:21,728 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:44:23,908 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:44:26,138 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:44:28,920 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:44:31,590 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:44:59,541 WARN L232 SmtUtils]: Spent 24.31s on a formula simplification that was a NOOP. DAG size: 132 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 11:45:01,576 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:45:38,997 WARN L232 SmtUtils]: Spent 23.22s on a formula simplification that was a NOOP. DAG size: 124 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 11:45:41,002 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:45:43,015 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:45:45,022 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:45:47,132 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:46:21,902 WARN L232 SmtUtils]: Spent 24.24s on a formula simplification that was a NOOP. DAG size: 107 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 11:46:24,282 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:46:26,288 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:46:28,311 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:46:31,342 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:46:33,604 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:46:35,607 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:46:40,048 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:46:44,154 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:46:46,578 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:46:48,681 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:46:50,721 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:46:53,570 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:46:54,703 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:46:56,706 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:46:58,711 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:47:05,397 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:47:07,456 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:47:08,902 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:47:13,650 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:47:15,229 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:47:16,818 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:47:18,873 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:47:32,588 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:47:38,151 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:47:40,155 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:47:42,219 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:47:45,200 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:47:47,220 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:47:49,295 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:47:51,303 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:47:53,307 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:47:55,310 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:47:57,312 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:47:59,316 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:48:01,321 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:48:03,346 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:48:05,465 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:48:09,591 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:48:11,594 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:48:13,597 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:48:15,668 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:48:18,007 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:48:20,009 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:48:23,052 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:48:25,065 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:49:06,468 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 41.40s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:49:20,447 WARN L232 SmtUtils]: Spent 6.98s on a formula simplification that was a NOOP. DAG size: 78 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 11:49:29,284 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:49:29,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:49:29,774 INFO L93 Difference]: Finished difference Result 1100 states and 1409 transitions. [2022-04-06 11:49:29,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 11:49:29,775 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 12 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (37), 14 states have call predecessors, (37), 11 states have call successors, (37) Word has length 128 [2022-04-06 11:49:29,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:49:29,779 INFO L225 Difference]: With dead ends: 1100 [2022-04-06 11:49:29,780 INFO L226 Difference]: Without dead ends: 1092 [2022-04-06 11:49:29,781 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 233 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 157.4s TimeCoverageRelationStatistics Valid=424, Invalid=1192, Unknown=24, NotChecked=0, Total=1640 [2022-04-06 11:49:29,781 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 136 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 1020 mSolverCounterSat, 181 mSolverCounterUnsat, 53 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 162.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 1254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 1020 IncrementalHoareTripleChecker+Invalid, 53 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 163.1s IncrementalHoareTripleChecker+Time [2022-04-06 11:49:29,781 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 458 Invalid, 1254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 1020 Invalid, 53 Unknown, 0 Unchecked, 163.1s Time] [2022-04-06 11:49:29,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1092 states. [2022-04-06 11:49:30,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1092 to 1067. [2022-04-06 11:49:30,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1067 states, 694 states have (on average 1.1959654178674353) internal successors, (830), 702 states have internal predecessors, (830), 273 states have call successors, (273), 101 states have call predecessors, (273), 99 states have return successors, (270), 263 states have call predecessors, (270), 270 states have call successors, (270) [2022-04-06 11:49:30,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 1373 transitions. [2022-04-06 11:49:30,057 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 1373 transitions. Word has length 128 [2022-04-06 11:49:30,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:49:30,057 INFO L478 AbstractCegarLoop]: Abstraction has 1067 states and 1373 transitions. [2022-04-06 11:49:30,057 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 12 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (37), 14 states have call predecessors, (37), 11 states have call successors, (37) [2022-04-06 11:49:30,057 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 1373 transitions. [2022-04-06 11:49:30,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-04-06 11:49:30,059 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:49:30,059 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:49:30,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-04-06 11:49:30,288 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:49:30,288 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:49:30,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:49:30,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1569660177, now seen corresponding path program 1 times [2022-04-06 11:49:30,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:49:30,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076982286] [2022-04-06 11:49:30,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:49:30,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:49:30,295 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:49:30,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1144969292] [2022-04-06 11:49:30,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:49:30,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:49:30,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:49:30,296 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:49:30,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-04-06 11:49:30,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:49:30,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 11:49:30,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:49:30,607 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 32 proven. 434 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-04-06 11:49:30,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:49:30,823 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 32 proven. 50 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2022-04-06 11:49:30,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:49:30,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076982286] [2022-04-06 11:49:30,823 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:49:30,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144969292] [2022-04-06 11:49:30,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144969292] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 11:49:30,824 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 11:49:30,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2022-04-06 11:49:30,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732240358] [2022-04-06 11:49:30,824 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 11:49:30,824 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 11:49:30,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:49:30,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 11:49:30,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-04-06 11:49:30,825 INFO L87 Difference]: Start difference. First operand 1067 states and 1373 transitions. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 11 states have call successors, (44), 8 states have call predecessors, (44), 7 states have return successors, (42), 9 states have call predecessors, (42), 10 states have call successors, (42) [2022-04-06 11:49:31,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:49:31,366 INFO L93 Difference]: Finished difference Result 1104 states and 1411 transitions. [2022-04-06 11:49:31,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 11:49:31,367 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 11 states have call successors, (44), 8 states have call predecessors, (44), 7 states have return successors, (42), 9 states have call predecessors, (42), 10 states have call successors, (42) Word has length 133 [2022-04-06 11:49:31,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:49:31,371 INFO L225 Difference]: With dead ends: 1104 [2022-04-06 11:49:31,371 INFO L226 Difference]: Without dead ends: 1094 [2022-04-06 11:49:31,372 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 252 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=166, Invalid=296, Unknown=0, NotChecked=0, Total=462 [2022-04-06 11:49:31,372 INFO L913 BasicCegarLoop]: 72 mSDtfsCounter, 161 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 11:49:31,373 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 321 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 11:49:31,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2022-04-06 11:49:31,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 1082. [2022-04-06 11:49:31,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1082 states, 709 states have (on average 1.1777150916784203) internal successors, (835), 717 states have internal predecessors, (835), 273 states have call successors, (273), 101 states have call predecessors, (273), 99 states have return successors, (270), 263 states have call predecessors, (270), 270 states have call successors, (270) [2022-04-06 11:49:31,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1082 states to 1082 states and 1378 transitions. [2022-04-06 11:49:31,657 INFO L78 Accepts]: Start accepts. Automaton has 1082 states and 1378 transitions. Word has length 133 [2022-04-06 11:49:31,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:49:31,658 INFO L478 AbstractCegarLoop]: Abstraction has 1082 states and 1378 transitions. [2022-04-06 11:49:31,659 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 11 states have call successors, (44), 8 states have call predecessors, (44), 7 states have return successors, (42), 9 states have call predecessors, (42), 10 states have call successors, (42) [2022-04-06 11:49:31,659 INFO L276 IsEmpty]: Start isEmpty. Operand 1082 states and 1378 transitions. [2022-04-06 11:49:31,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-04-06 11:49:31,660 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:49:31,660 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:49:31,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-04-06 11:49:31,883 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:49:31,883 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:49:31,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:49:31,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1381701507, now seen corresponding path program 2 times [2022-04-06 11:49:31,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:49:31,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467984102] [2022-04-06 11:49:31,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:49:31,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:49:31,894 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:49:31,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1099330905] [2022-04-06 11:49:31,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 11:49:31,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:49:31,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:49:31,895 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:49:31,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-04-06 11:49:31,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 11:49:31,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 11:49:31,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 90 conjunts are in the unsatisfiable core [2022-04-06 11:49:32,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:49:34,280 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 123 proven. 126 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2022-04-06 11:49:34,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:49:35,481 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 156 proven. 12 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 11:49:35,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:49:35,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467984102] [2022-04-06 11:49:35,481 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:49:35,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099330905] [2022-04-06 11:49:35,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099330905] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 11:49:35,481 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 11:49:35,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12] total 26 [2022-04-06 11:49:35,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584137546] [2022-04-06 11:49:35,482 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 11:49:35,482 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 11:49:35,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:49:35,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 11:49:35,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2022-04-06 11:49:35,483 INFO L87 Difference]: Start difference. First operand 1082 states and 1378 transitions. Second operand has 26 states, 21 states have (on average 2.619047619047619) internal successors, (55), 19 states have internal predecessors, (55), 14 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 11 states have call predecessors, (31), 12 states have call successors, (31) [2022-04-06 11:49:43,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:49:43,226 INFO L93 Difference]: Finished difference Result 1135 states and 1435 transitions. [2022-04-06 11:49:43,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 11:49:43,229 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 21 states have (on average 2.619047619047619) internal successors, (55), 19 states have internal predecessors, (55), 14 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 11 states have call predecessors, (31), 12 states have call successors, (31) Word has length 134 [2022-04-06 11:49:43,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:49:43,233 INFO L225 Difference]: With dead ends: 1135 [2022-04-06 11:49:43,233 INFO L226 Difference]: Without dead ends: 1124 [2022-04-06 11:49:43,234 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 243 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=323, Invalid=1399, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 11:49:43,234 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 104 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 1001 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 1163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 1001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-04-06 11:49:43,235 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 517 Invalid, 1163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 1001 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-04-06 11:49:43,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1124 states. [2022-04-06 11:49:43,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1124 to 981. [2022-04-06 11:49:43,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 981 states, 637 states have (on average 1.1585557299843015) internal successors, (738), 649 states have internal predecessors, (738), 246 states have call successors, (246), 98 states have call predecessors, (246), 97 states have return successors, (244), 233 states have call predecessors, (244), 244 states have call successors, (244) [2022-04-06 11:49:43,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 1228 transitions. [2022-04-06 11:49:43,471 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 1228 transitions. Word has length 134 [2022-04-06 11:49:43,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:49:43,471 INFO L478 AbstractCegarLoop]: Abstraction has 981 states and 1228 transitions. [2022-04-06 11:49:43,471 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 21 states have (on average 2.619047619047619) internal successors, (55), 19 states have internal predecessors, (55), 14 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 11 states have call predecessors, (31), 12 states have call successors, (31) [2022-04-06 11:49:43,471 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 1228 transitions. [2022-04-06 11:49:43,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-04-06 11:49:43,474 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:49:43,474 INFO L499 BasicCegarLoop]: trace histogram [25, 24, 24, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:49:43,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-04-06 11:49:43,699 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:49:43,699 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:49:43,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:49:43,700 INFO L85 PathProgramCache]: Analyzing trace with hash 178424492, now seen corresponding path program 2 times [2022-04-06 11:49:43,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:49:43,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497144375] [2022-04-06 11:49:43,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:49:43,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:49:43,707 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:49:43,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [94050036] [2022-04-06 11:49:43,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 11:49:43,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:49:43,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:49:43,708 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:49:43,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-04-06 11:49:43,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 11:49:43,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-04-06 11:49:43,859 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 11:49:43,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 11:49:44,047 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 11:49:44,047 INFO L618 BasicCegarLoop]: Counterexample is feasible [2022-04-06 11:49:44,048 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 11:49:44,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-04-06 11:49:44,275 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:49:44,278 INFO L719 BasicCegarLoop]: Path program histogram: [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:49:44,280 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-06 11:49:44,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 11:49:44 BasicIcfg [2022-04-06 11:49:44,359 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-06 11:49:44,359 INFO L158 Benchmark]: Toolchain (without parser) took 429410.53ms. Allocated memory was 179.3MB in the beginning and 312.5MB in the end (delta: 133.2MB). Free memory was 127.0MB in the beginning and 190.8MB in the end (delta: -63.8MB). Peak memory consumption was 71.7MB. Max. memory is 8.0GB. [2022-04-06 11:49:44,360 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 179.3MB. Free memory is still 142.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 11:49:44,360 INFO L158 Benchmark]: CACSL2BoogieTranslator took 211.80ms. Allocated memory was 179.3MB in the beginning and 216.0MB in the end (delta: 36.7MB). Free memory was 126.8MB in the beginning and 193.6MB in the end (delta: -66.8MB). Peak memory consumption was 13.4MB. Max. memory is 8.0GB. [2022-04-06 11:49:44,360 INFO L158 Benchmark]: Boogie Preprocessor took 27.73ms. Allocated memory is still 216.0MB. Free memory was 193.6MB in the beginning and 192.0MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-06 11:49:44,360 INFO L158 Benchmark]: RCFGBuilder took 299.06ms. Allocated memory is still 216.0MB. Free memory was 192.0MB in the beginning and 178.9MB in the end (delta: 13.1MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2022-04-06 11:49:44,360 INFO L158 Benchmark]: IcfgTransformer took 47.44ms. Allocated memory is still 216.0MB. Free memory was 178.9MB in the beginning and 177.3MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-06 11:49:44,361 INFO L158 Benchmark]: TraceAbstraction took 428815.24ms. Allocated memory was 216.0MB in the beginning and 312.5MB in the end (delta: 96.5MB). Free memory was 176.8MB in the beginning and 190.8MB in the end (delta: -14.0MB). Peak memory consumption was 83.5MB. Max. memory is 8.0GB. [2022-04-06 11:49:44,361 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 179.3MB. Free memory is still 142.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 211.80ms. Allocated memory was 179.3MB in the beginning and 216.0MB in the end (delta: 36.7MB). Free memory was 126.8MB in the beginning and 193.6MB in the end (delta: -66.8MB). Peak memory consumption was 13.4MB. Max. memory is 8.0GB. * Boogie Preprocessor took 27.73ms. Allocated memory is still 216.0MB. Free memory was 193.6MB in the beginning and 192.0MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 299.06ms. Allocated memory is still 216.0MB. Free memory was 192.0MB in the beginning and 178.9MB in the end (delta: 13.1MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * IcfgTransformer took 47.44ms. Allocated memory is still 216.0MB. Free memory was 178.9MB in the beginning and 177.3MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 428815.24ms. Allocated memory was 216.0MB in the beginning and 312.5MB in the end (delta: 96.5MB). Free memory was 176.8MB in the beginning and 190.8MB in the end (delta: -14.0MB). Peak memory consumption was 83.5MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; VAL [\old(counter)=13, counter=0] [L20] int x, y; [L21] long long a, b, p, q, r, s, c, k, xy, yy; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L24] RET assume_abort_if_not(x >= 1) VAL [\old(counter)=0, counter=0, x=5, y=8] [L25] CALL assume_abort_if_not(y >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L25] RET assume_abort_if_not(y >= 1) VAL [\old(counter)=0, counter=0, x=5, y=8] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 [L33] c = 0 [L34] k = 0 [L35] xy = (long long) x * y [L36] yy = (long long) y * y VAL [\old(counter)=0, a=5, b=8, c=0, counter=0, k=0, p=1, q=0, r=0, s=1, x=5, xy=40, y=8, yy=64] [L37] CALL assume_abort_if_not(xy < 2147483647) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L37] RET assume_abort_if_not(xy < 2147483647) VAL [\old(counter)=0, a=5, b=8, c=0, counter=0, k=0, p=1, q=0, r=0, s=1, x=5, xy=40, y=8, yy=64] [L38] CALL assume_abort_if_not(yy < 2147483647) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L38] RET assume_abort_if_not(yy < 2147483647) VAL [\old(counter)=0, a=5, b=8, c=0, counter=0, k=0, p=1, q=0, r=0, s=1, x=5, xy=40, y=8, yy=64] [L40] EXPR counter++ VAL [\old(counter)=0, a=5, b=8, c=0, counter=1, counter++=0, k=0, p=1, q=0, r=0, s=1, x=5, xy=40, y=8, yy=64] [L40] COND TRUE counter++<10 [L41] COND FALSE !(!(b != 0)) [L43] c = a [L44] k = 0 VAL [\old(counter)=0, a=5, b=8, c=5, counter=1, k=0, p=1, q=0, r=0, s=1, x=5, xy=40, y=8, yy=64] [L46] EXPR counter++ VAL [\old(counter)=0, a=5, b=8, c=5, counter=2, counter++=1, k=0, p=1, q=0, r=0, s=1, x=5, xy=40, y=8, yy=64] [L46] COND TRUE counter++<10 [L47] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L47] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=5, b=8, c=5, counter=2, k=0, p=1, q=0, r=0, s=1, x=5, xy=40, y=8, yy=64] [L48] CALL __VERIFIER_assert(a == y*r + x*p) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L48] RET __VERIFIER_assert(a == y*r + x*p) VAL [\old(counter)=0, a=5, b=8, c=5, counter=2, k=0, p=1, q=0, r=0, s=1, x=5, xy=40, y=8, yy=64] [L49] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L49] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=5, b=8, c=5, counter=2, k=0, p=1, q=0, r=0, s=1, x=5, xy=40, y=8, yy=64] [L50] CALL __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L50] RET __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) VAL [\old(counter)=0, a=5, b=8, c=5, counter=2, k=0, p=1, q=0, r=0, s=1, x=5, xy=40, y=8, yy=64] [L51] COND TRUE !(c >= b) VAL [\old(counter)=0, a=5, b=8, c=5, counter=2, k=0, p=1, q=0, r=0, s=1, x=5, xy=40, y=8, yy=64] [L57] a = b [L58] b = c [L60] long long temp; [L61] temp = p [L62] p = q [L63] q = temp - q * k [L64] temp = r [L65] r = s [L66] s = temp - s * k VAL [\old(counter)=0, a=8, b=5, c=5, counter=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=5, xy=40, y=8, yy=64] [L40] EXPR counter++ VAL [\old(counter)=0, a=8, b=5, c=5, counter=3, counter++=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=5, xy=40, y=8, yy=64] [L40] COND TRUE counter++<10 [L41] COND FALSE !(!(b != 0)) [L43] c = a [L44] k = 0 VAL [\old(counter)=0, a=8, b=5, c=8, counter=3, k=0, p=0, q=1, r=1, s=0, temp=0, x=5, xy=40, y=8, yy=64] [L46] EXPR counter++ VAL [\old(counter)=0, a=8, b=5, c=8, counter=4, counter++=3, k=0, p=0, q=1, r=1, s=0, temp=0, x=5, xy=40, y=8, yy=64] [L46] COND TRUE counter++<10 [L47] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L47] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=8, b=5, c=8, counter=4, k=0, p=0, q=1, r=1, s=0, temp=0, x=5, xy=40, y=8, yy=64] [L48] CALL __VERIFIER_assert(a == y*r + x*p) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L48] RET __VERIFIER_assert(a == y*r + x*p) VAL [\old(counter)=0, a=8, b=5, c=8, counter=4, k=0, p=0, q=1, r=1, s=0, temp=0, x=5, xy=40, y=8, yy=64] [L49] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L49] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=8, b=5, c=8, counter=4, k=0, p=0, q=1, r=1, s=0, temp=0, x=5, xy=40, y=8, yy=64] [L50] CALL __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L50] RET __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) VAL [\old(counter)=0, a=8, b=5, c=8, counter=4, k=0, p=0, q=1, r=1, s=0, temp=0, x=5, xy=40, y=8, yy=64] [L51] COND FALSE !(!(c >= b)) [L53] c = c - b [L54] k = k + 1 VAL [\old(counter)=0, a=8, b=5, c=3, counter=4, k=1, p=0, q=1, r=1, s=0, temp=0, x=5, xy=40, y=8, yy=64] [L46] EXPR counter++ VAL [\old(counter)=0, a=8, b=5, c=3, counter=5, counter++=4, k=1, p=0, q=1, r=1, s=0, temp=0, x=5, xy=40, y=8, yy=64] [L46] COND TRUE counter++<10 [L47] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L47] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=8, b=5, c=3, counter=5, k=1, p=0, q=1, r=1, s=0, temp=0, x=5, xy=40, y=8, yy=64] [L48] CALL __VERIFIER_assert(a == y*r + x*p) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L48] RET __VERIFIER_assert(a == y*r + x*p) VAL [\old(counter)=0, a=8, b=5, c=3, counter=5, k=1, p=0, q=1, r=1, s=0, temp=0, x=5, xy=40, y=8, yy=64] [L49] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L49] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=8, b=5, c=3, counter=5, k=1, p=0, q=1, r=1, s=0, temp=0, x=5, xy=40, y=8, yy=64] [L50] CALL __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L50] RET __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) VAL [\old(counter)=0, a=8, b=5, c=3, counter=5, k=1, p=0, q=1, r=1, s=0, temp=0, x=5, xy=40, y=8, yy=64] [L51] COND TRUE !(c >= b) VAL [\old(counter)=0, a=8, b=5, c=3, counter=5, k=1, p=0, q=1, r=1, s=0, temp=0, x=5, xy=40, y=8, yy=64] [L57] a = b [L58] b = c [L60] long long temp; [L61] temp = p [L62] p = q [L63] q = temp - q * k [L64] temp = r [L65] r = s [L66] s = temp - s * k VAL [\old(counter)=0, a=5, b=3, c=3, counter=5, k=1, p=1, q=-1, r=0, s=1, temp=1, x=5, xy=40, y=8, yy=64] [L40] EXPR counter++ VAL [\old(counter)=0, a=5, b=3, c=3, counter=6, counter++=5, k=1, p=1, q=-1, r=0, s=1, temp=1, x=5, xy=40, y=8, yy=64] [L40] COND TRUE counter++<10 [L41] COND FALSE !(!(b != 0)) [L43] c = a [L44] k = 0 VAL [\old(counter)=0, a=5, b=3, c=5, counter=6, k=0, p=1, q=-1, r=0, s=1, temp=1, x=5, xy=40, y=8, yy=64] [L46] EXPR counter++ VAL [\old(counter)=0, a=5, b=3, c=5, counter=7, counter++=6, k=0, p=1, q=-1, r=0, s=1, temp=1, x=5, xy=40, y=8, yy=64] [L46] COND TRUE counter++<10 [L47] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=7] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=7] [L47] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=5, b=3, c=5, counter=7, k=0, p=1, q=-1, r=0, s=1, temp=1, x=5, xy=40, y=8, yy=64] [L48] CALL __VERIFIER_assert(a == y*r + x*p) VAL [\old(cond)=1, \old(counter)=0, counter=7] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=7] [L48] RET __VERIFIER_assert(a == y*r + x*p) VAL [\old(counter)=0, a=5, b=3, c=5, counter=7, k=0, p=1, q=-1, r=0, s=1, temp=1, x=5, xy=40, y=8, yy=64] [L49] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=7] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=7] [L49] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=5, b=3, c=5, counter=7, k=0, p=1, q=-1, r=0, s=1, temp=1, x=5, xy=40, y=8, yy=64] [L50] CALL __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) VAL [\old(cond)=1, \old(counter)=0, counter=7] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=7] [L50] RET __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) VAL [\old(counter)=0, a=5, b=3, c=5, counter=7, k=0, p=1, q=-1, r=0, s=1, temp=1, x=5, xy=40, y=8, yy=64] [L51] COND FALSE !(!(c >= b)) [L53] c = c - b [L54] k = k + 1 VAL [\old(counter)=0, a=5, b=3, c=2, counter=7, k=1, p=1, q=-1, r=0, s=1, temp=1, x=5, xy=40, y=8, yy=64] [L46] EXPR counter++ VAL [\old(counter)=0, a=5, b=3, c=2, counter=8, counter++=7, k=1, p=1, q=-1, r=0, s=1, temp=1, x=5, xy=40, y=8, yy=64] [L46] COND TRUE counter++<10 [L47] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=8] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=8] [L47] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=5, b=3, c=2, counter=8, k=1, p=1, q=-1, r=0, s=1, temp=1, x=5, xy=40, y=8, yy=64] [L48] CALL __VERIFIER_assert(a == y*r + x*p) VAL [\old(cond)=1, \old(counter)=0, counter=8] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=8] [L48] RET __VERIFIER_assert(a == y*r + x*p) VAL [\old(counter)=0, a=5, b=3, c=2, counter=8, k=1, p=1, q=-1, r=0, s=1, temp=1, x=5, xy=40, y=8, yy=64] [L49] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=8] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=8] [L49] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=5, b=3, c=2, counter=8, k=1, p=1, q=-1, r=0, s=1, temp=1, x=5, xy=40, y=8, yy=64] [L50] CALL __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) VAL [\old(cond)=1, \old(counter)=0, counter=8] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=8] [L50] RET __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) VAL [\old(counter)=0, a=5, b=3, c=2, counter=8, k=1, p=1, q=-1, r=0, s=1, temp=1, x=5, xy=40, y=8, yy=64] [L51] COND TRUE !(c >= b) VAL [\old(counter)=0, a=5, b=3, c=2, counter=8, k=1, p=1, q=-1, r=0, s=1, temp=1, x=5, xy=40, y=8, yy=64] [L57] a = b [L58] b = c [L60] long long temp; [L61] temp = p [L62] p = q [L63] q = temp - q * k [L64] temp = r [L65] r = s [L66] s = temp - s * k VAL [\old(counter)=0, a=3, b=2, c=2, counter=8, k=1, p=-1, q=2, r=1, s=-1, temp=0, x=5, xy=40, y=8, yy=64] [L40] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=2, counter=9, counter++=8, k=1, p=-1, q=2, r=1, s=-1, temp=0, x=5, xy=40, y=8, yy=64] [L40] COND TRUE counter++<10 [L41] COND FALSE !(!(b != 0)) [L43] c = a [L44] k = 0 VAL [\old(counter)=0, a=3, b=2, c=3, counter=9, k=0, p=-1, q=2, r=1, s=-1, temp=0, x=5, xy=40, y=8, yy=64] [L46] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=3, counter=10, counter++=9, k=0, p=-1, q=2, r=1, s=-1, temp=0, x=5, xy=40, y=8, yy=64] [L46] COND TRUE counter++<10 [L47] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=10] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=10] [L47] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=3, b=2, c=3, counter=10, k=0, p=-1, q=2, r=1, s=-1, temp=0, x=5, xy=40, y=8, yy=64] [L48] CALL __VERIFIER_assert(a == y*r + x*p) VAL [\old(cond)=1, \old(counter)=0, counter=10] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=10] [L48] RET __VERIFIER_assert(a == y*r + x*p) VAL [\old(counter)=0, a=3, b=2, c=3, counter=10, k=0, p=-1, q=2, r=1, s=-1, temp=0, x=5, xy=40, y=8, yy=64] [L49] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=10] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=10] [L49] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=3, b=2, c=3, counter=10, k=0, p=-1, q=2, r=1, s=-1, temp=0, x=5, xy=40, y=8, yy=64] [L50] CALL __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) VAL [\old(cond)=1, \old(counter)=0, counter=10] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=10] [L50] RET __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) VAL [\old(counter)=0, a=3, b=2, c=3, counter=10, k=0, p=-1, q=2, r=1, s=-1, temp=0, x=5, xy=40, y=8, yy=64] [L51] COND FALSE !(!(c >= b)) [L53] c = c - b [L54] k = k + 1 VAL [\old(counter)=0, a=3, b=2, c=1, counter=10, k=1, p=-1, q=2, r=1, s=-1, temp=0, x=5, xy=40, y=8, yy=64] [L46] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=1, counter=11, counter++=10, k=1, p=-1, q=2, r=1, s=-1, temp=0, x=5, xy=40, y=8, yy=64] [L46] COND FALSE !(counter++<10) [L57] a = b [L58] b = c [L60] long long temp; [L61] temp = p [L62] p = q [L63] q = temp - q * k [L64] temp = r [L65] r = s [L66] s = temp - s * k VAL [\old(counter)=0, a=2, b=1, c=1, counter=11, k=1, p=2, q=-3, r=-1, s=2, temp=1, x=5, xy=40, y=8, yy=64] [L40] EXPR counter++ VAL [\old(counter)=0, a=2, b=1, c=1, counter=12, counter++=11, k=1, p=2, q=-3, r=-1, s=2, temp=1, x=5, xy=40, y=8, yy=64] [L40] COND FALSE !(counter++<10) [L70] CALL __VERIFIER_assert(q*x + s*y == 0) VAL [\old(cond)=0, \old(counter)=0, counter=12] [L11] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=12] [L13] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=12] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 428.7s, OverallIterations: 23, TraceHistogramMax: 25, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 330.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 53 mSolverCounterUnknown, 1341 SdHoareTripleChecker+Valid, 175.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1264 mSDsluCounter, 5123 SdHoareTripleChecker+Invalid, 175.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3979 mSDsCounter, 1269 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5772 IncrementalHoareTripleChecker+Invalid, 7094 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1269 mSolverCounterUnsat, 1144 mSDtfsCounter, 5772 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2911 GetRequests, 2548 SyntacticMatches, 21 SemanticMatches, 342 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1393 ImplicationChecksByTransitivity, 174.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1082occurred in iteration=21, InterpolantAutomatonStates: 271, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.5s AutomataMinimizationTime, 22 MinimizatonAttempts, 346 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 89.7s InterpolantComputationTime, 1829 NumberOfCodeBlocks, 1755 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 2681 ConstructedInterpolants, 0 QuantifiedInterpolants, 16818 SizeOfPredicates, 122 NumberOfNonLiveVariables, 4696 ConjunctsInSsa, 577 ConjunctsInUnsatCore, 36 InterpolantComputations, 7 PerfectInterpolantSequences, 5425/6716 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-04-06 11:49:44,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...